Machine for coiling spiral springs.



, E.Y WMNBR.-A l v MAGHINE 'QR GOLING SPIRAL SPRINGS.

Patented nee. 29, 19.14..

APPLICATION FILD APR.23,1913

L'. Wa5n11 lNVENTOR y A A ATTORNEY E. WAGNER. y MACHINE POR GILNG SPIRALSPRNGS.

' APPLcAT1oN'f1LED.-APR.23, ma. 1,1 22,447., meute@ Deo. 29,1914L l 8SHEETS-Saum.

wlmgssgg ANV'ENTGR if -l MM ATTORNEY E. WAGNER.

MACHINE POR COILING SPIRAL SPRINGS.

AFPLICATlON YILED APR.23,19I3.

Patented Deo. 29, 1914.

E SHEETS-SHEET 3,

-.Wagner INVENR l im ,4 Y Wham/fw a' e ATTORNEY nu muuu rlrrrn rnmuur/nm wAvummm n r E. WAGNER.'

MACHINE FOR GOILNG SEBAL SPRIN Y l APPLXGATION ILED PR 23, 1913. l ,l22,447.

Patented 29, H914.

8 SHEETS-SHEET "i,

E. WAGNER. K MACHINE FOR COILING SPIRAL SPRINGS.

APPLICATION FILED APB..23,1913.

Patented De.29,1914.

B SHEETS-SHEET 5.

Vl E N R 0 T T A E.' WAGNER.

MACHINE FOR GOLING SPIRAL SPRINGS.

AFPLIGATION FILED APB. Z3, 1913. -v

Patented Dec.29,19145 a SHEETS-SHEET e.

K-,Wagner lNVENTOR fami? ATTORNEY E. WAGNER. MACHINE FOB. GOILING SPIRALSPRINGS.

` APPLIQATIONTILBD APR. 23,1913.

Patented Dec. 29, 19m

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ESTATES .erreur onirica;

ERNST WAGNER, OF REUTLINGEN, GERMANY.

MACHNE FOR COILING SRL SPRINGS.

ddii/2.44.7.

Speccation of ,Letters Patent.

Patented Dec. 29, 1914.

Application filed pril 23, 1913. Serial No. 763,038.

cation.

rihis invention relates to; an improved machine for manufacturing invarious lengths and with various diameters, helical springs, eitherclosed l springs (tension springs), open springs (compression springs)or open springs with closed endv convolutions.

' ylfhe most important feature of the invention is this, that a shaftconnected to a driving pulley by means of a one-revolution clutchcontrols, by means of cams, a severing device, a pitch forming member, awire feeder and a clutch connecting a regulating shaft to aconstantlyrrevolving shaft, in

such manner, that during thesevering of the wire the wire feeder isinactive and the regulating device is disconnected from its drive. Theengagement of the said one-revolution clutch is effected by the actionof a tooth carried by the regulating shaft, which tooth may be adjustedfor diiferent numbers of convclutiens of the springs to be manufactured.The regulating shaft, when disconnected from its drive returns instantlyinto its initial position, so as to be ready for regulating thesubsequent working cycle.

@ne form of the improved machine constructed in accordance with thisinvention is shown by way ofexarnple in the accompanying drawings, inwhich Figure 1 is a front elevation of the machine. Fig. 2 is a verticalsection on the line Q 2 of Fig. l, Fig. 3 is a plan, Fig. d is a frontelevation drawn to an enlarged scale of the apparatus for coiling,`altering the pitch of the spiral, stopping the feed of the wire andcutting the wire, said apparatus being adjustable on the machine frameforward and backward by means of a slideway (see 77 in Fig. l). Fig. 5shows the inner side of the apparatus accordto Fig. fi partly insection. Figs. 6 and 7 are respectively a longitudinal section and endview also drawn to larger scale, of the device for regulating the numberof convclutions of the springs to be made, and

cl to are views of details.

in the improved machine the wire l (Figs.

l and 4) passes through the rolls 2, which are adjustably mounted in aknown manner, and which serve for straightening the wire, between thefeed rolls 3 and 4i. The shaft of the lower of these rolls, z'. e. 3, isdriven slowly by means of toothed gearing :i6/B5, Pil/33 from thedriving pulley 37, and drives in its turn by means of toothed wheels30/40 (Fig. 2) the upper feed roll fi, and by means of toothed wheels81/32 the worm 38, which gears with the worm wheel 61 of the regulatingdevice (Figs. 6 and 7 )L In front of the feed rolls 3 and 4, the wirepasses into the groove of a guideplate 5 (Figs. l and 4) by whichit isguided on to the periphery of the iirst of the two delecting rolls 6which are adjustably mounted by means of slides 6 and spindles, lso asto render possible the manufacture of springs of diiferent diameters.The deflecting rolls bend the wire in a circular form in the usualmanner (see l Fig. 4c). Above the adjustable finger 7 which is carriedby the rail 7 (Figsfi and 5) and by means of which inger astriking ofthe front end of the wire against the guide plate is prevented whenceiling so-coiled closed springs, the wire passes Yfarther between thecutting knives 9, 9. ofthe cutting-olf device. In the guide rolls 3 and4 in the illustrated example, a number of grooves' are produced byturning which serv/,e for accommodating different thicknesses Vof wire.The sliding movement lof the whole apparatus shown in Figs. 4

and 5 in its guideway 77 Yuoduced by means of the spindle 78 (Fig. l),serves to bring the guide plate 5 together with the deflecting rolls 6in a line with those grooves of the pair of rolls which are to be usedfor the particular work in hand. The straightening rolls 2 can also bemoved into line with the different grooves by the displacement of theframe Q (see Fig. 3).

W'hen in addition to the cutting apparatus described more fullyhereinafter only the defleoting rolls 6, 6 and the finger 7 are inoperation in the ceiling apparatus (Figs. 4 and 5), the apparatusproduces closed springs. Fig. 5 shows an adjustment of the coilingapparatus for making open springs (see 1'). For this purpose the slidel0, which is movably mounted'in the direction of the axis of the springvto be coiled, is moved forward with its interchangeable head l0 towardthe spring l in such a manner that the desired pitch is imparted to.

g ideama slide drawn back. Open springs (compression springs) should asa rule have a single closed turn or convolution at each end. ln order tosatisfy this requirement the slide must be drawn back at thecommencement of the ceiling of the sprin then moved forward on thecompletion o a rst turn of the spring, and then drawn back again at thebeginning of the last turn but one.l This movement of the pitch formingslide 10 is derived from the shaft 20 through the medium of two doublelevers 11, 11 and the guide cam 12, 13 13, provided on the toothed wheel28. The shaft 20 also actuates by means of the cam 22 and b ell cranklever 23, the cutting slide 8, and the gea-ring 28/51 of said shaft withthe aid of an.

automatic controlling mechanism to be described below is alternatelyconnected to and disconnected from the fly wheel 52 Fig. 5, whichdscontinuously driven by means of a belt. lThe coupling device for thispurpose is constructed as follows z-ln the hub 53 (Figs. 5, 10 and 11)which is keyed by the side of the toothed wheel 51 on the shaft 50 thereis mounted the coupling pin 54 at any one point ,of the periphery ofsaid hub, said coupling pin being movable in the axial direction. Thehead 54 of this pin if adapted to enter under the action of a spring 55the oppositely situated bored hole in anyone of tpe bolts. 59, which arefixed in the iiy wheel hub. There may be any number of these bolts 59.The coupling bolt 54 is normally held in its drawn back position againstthe action of the spring 55 (Fig. 5)

by the curved'bar 58 (Figs. l2 and 13) which issharpened at one end andcarried by the lever 87 (see also Fig. 14). By means of this curved bar58 the small roller 56 mounted on the Hattened end 54 of the couplingbolt is held away fromthe small plate or disk 57. When the lever 87 canswing to the left (anti-clockwise in Fig. 4) under the action of thespring 88 after the projection 86 has moved out of` its way (bottom ofFig. 4 and Fig. 14) at the beginning of the ceiling of the last turn butone of the spiral 1, the roller 56 is released by the curvedl bar 58 andthe coupling pin 54 can move to the position'as shown in Fig. 11,whereby the coupling is thrown into engagement, whereupon the shaft 50and therewith also the shaft 20 is caused to rotate. During the firstpart of the revolution of the shaft 20, the roller 1l (Fig. 5) which iscarried by the' upper of the two double levers 11, moves from the raisedpart of the cani 11,` 12 and 13 on to the lower part of the same so thatthe pitch slide 10 can return into the inoperative position. When Y theshaft 20 has nearly completed half a revolution (clockwise, z'. e.toward the right,

F ig. 4) the cam 22 on the end of the shaft 2O acts on the roller 24which is carried by the bell crank lever 23, whereby the cutting 0Edevice is operated. The spindle 26 which' can be screwed into the eye 23of the bell crank lever 23 presses down the rod 8 in the front part ofthe framel 74, which -rod is vertically adjustable and to which jtheupper shearing knife 9 is screwed, so

that through the coperation of the two shearing knives 9 and 9 thespiral is cut oil.

The wire feed must be stopped during the cutting of the wire. For thispurpose the axle of the upper feed roll 4 is mounted in a slide 41 (Fig.2) which is adapted to move vertically in a suitable guide and on theupper surface of which slide rests av pressure rod 42. The pressure isproduced by a system of levers constructed as followsz-The long arm 45of the double lever 44, 45 (Eigs. 1, 2 and 3) which is mounted in an eye48 on the head plate 49 of the frame, carries a roller 46 which bears onthe periphery of the, cam 21 keyed on the shaft 20. The short arm 44rests on the end ofthe lever 43 which is mounted between two eyes 47 ofthe head plate 49, the said lever 43 acting with a very short lever arm(Fig. 2) on the pressing rod 42. When the parts assume the positionillustrated in the drawings, the upper feed roll 4, is thus pressed verypowerfully against the lower roll 3. When, after the lever 87 has swungout, the shaft 20 has completed nearly a half of a revolution, thedepressed or lower part of the cam 21 arrives under lthe roll 46 and theupper feed.

roll is thereby relieved from pressure until the completely coiled wirespiral completely severed. During the last quarter of the revolution ofthe shaft 20 the cam 13, 12 (Figs' and 9) arrivesunder the roller 11 ofthe upper' double lever 11, in such a manner that the new spiral, afterthe first tumor convolution of the same. having been wound closed, iswound open as shown in Fi 5. f

The controlling device shown in Fig. 14

has been and the regulating device shown in Figs. 6 f and 7 areconstructed asfollowm--A worm 38 (Figs. 6. and 7 which,'ias alreadydescribed above, is driven from the shaft of the lower feeding roll 8 by`means of the` on to the part 72 and engaging in a neck" groove of theshaft. The clutch disk 62 @au gear as above described.

mounted so as to slide on the shaft 60 and rotating therewith isnormally pressed by the spring Ge against the Worm Wheel so that theconical or concave conically turned ianges bear lirmly against eachothe' and consequently the disk 52, and therefore also the shaft 60 iscarried around by the continuously rotating Worm Wheel 6l. The hub ofthe disk 62 is embraced by a clip 63 to 1o which the angle lever 91 ispivoted, by means of 7which latter the shal't G0 is uncoupled from thedrive. i On the other end of the shaft GO there is keyed a. rope pulley65 which when the hand operated nut 69 is tightened up also drives theloose pulley G7 on the shaft through the cooperation of the cone shapedor hollow cone-shaped turned flanges. As the shaft 60 revolves a stop ortooth 68 mounted on the periphery of this pulley 67 strikes against theend of the lever 8O and rotates it in opposition to the action of thespring Sl. consequently the connecting rod 82 which is pivoted to thelever rotates the bell crank lever 83 (Figs, l, 2 and lei) which in itsturn rocks the bell cranlr lever 85 by means of the rod 8l in such amanner, that the projection S6 releases the lever S7 Which under theaction of the spring S8 and therel,v couples the shaft Q0 to its driving'When the shaft 20 has made nearly hall:` revolution in the direction ofthe arrouY (Fig. lei), the lever :27 which is keyed on the saine pivot25 as the hell crank lever 23 which operates the cutting oli device,acts momentarily on the pressing rod 92. so that the bell crank leverSil (Figs. 14 and 6) is turned against the action of the spring (34,whereby the shaft G0 is uncouplcd from its driving gear. The el) shaft60 (during the cutting oliq or" the Wire) then returns momentarily underthe action of the Weight 65 (Figs. 2 and 6), until the stop (i6 on theinner surface of the pulley 65 strikes against yhe bolt 73 screwed inthe if bracket 70. Simultaneously With the recoinniencenient of `thefeeding or' the Wire by the rolls and l? 9:2 is again released by E27and the coupling Cil/62 closes again. At 'the commencement of thereverse rota-- tion of the shaft 30, the leyer mechanism 80. 82, Si Si,returns under the action of di into the position shown in the o that thelever SQL-after it has as described above, into the position illus "atedin the draivings, through the action of the cani Q9 ot the pulley 29 onthe roller S0 or" said lever and in which position the said lever holdsthe coupling 53- of the shaft in the disengaged posiion l y ineens ofthe bent bar 3S- is again in position by the projection to adjust themachine for a di'li'eroi coni'olutions of the springs iiiiciured the nutG9 on the lernt- 6) of the .shaft 60 is un locked and the disk 67shifted relatively to the pulley a corresponding amount. W hen the saiddish is adjusted as illustrated in the drawings7 the forward rotation ofthe shaft 60 extends over about a third of a 70 revolution correspondingto about 17 revolutions of the rolls 3 and 4 which advance the wire andcorresponding to about 38 turns of the spring manufactured in eachworking cycle.

ln consequence ol the transverse movability ol the frame 74 of thecoiling and cutting oli apparatus, correspondingly large dimen'.- sionsin the direction or' the movement of the frame must be given to theroller 46 resting 80 on the pulley 2l, further to the lever 27 acting onthe pressing rod 92, and also to the projection SGj which arrests thelever S7, so that these parts respectively @Quilt in the requisitemanner in every position of the 86 iframe.

'in the example shown means are provided for enabling if desired a partof a turn or more than a turn of both ends of the Qomprcssion spring tobe Wound close. These 90 ineans consist in that the guide cam providedon the toothed Wheel 2S which acts through the medium of the pair. ofbell crank levers ll, 1l, upon the pitch-forming slide l0. formed inthree parts (Fig. 9). 95 liv shitting the two parts 13, 13 of the camlfm-lH-ll toward Aach other the machine isadjusi'ed for coiling closedless than one turn at both ends of the springs, and by shifting saine:may from each other, the machine is adjusted for ceiling closed moretha one turn. By replacing the Cam 13* 12m-lil by a circular ring, themachine can be aiglapted for manufacturing open springs lwith open endccnyulutions; and by renioyrh ing the pitch forming slide it is possibleto wind close springs.

The following is a summary of the mode of operation of the machine: Inthe position of the parts illustrated in the drawings the shaft 20 is atrest; the upper feed roll 4 is pressed against the lower one 3, thepitch forming slide l0 is pushed forward and the shaft 60 revolvesslowly forward until finally the stop 68 cornes into contact 115 withthe lever 80. The lever mechanism .S0- 9.6, is then set in motion, thelever 87 is released. and in its turn releases the coupling 3-59- Thelatter is closed and the shaf 20 begins to revolve, consequently 120lirstl*7 the pitch-forming slide l0 can return into the inoperativeposition. .'When the shaft 2O has made nearly half a revolution the feedroll ai is relieved from pres` sure, that the wire feed stops and thecult-ing olf device 8 and 9 is operated and sin-lult necusly through themedium of the rod the coupling (il/G2 of the shaft 60, which has up tillnow continued to revolve slowly forward, is released for a short time,

so that this shaft returns momentarily into its original position. Atthe same time the lever mechanism 80-86 moves back under the influenceof the spring 81 into the ready position, Whereas on the other hand thelever S7 remains for the time being in the swung out position. Inconsequence of the further rotation of the shaft 20 the upper feed rolll is again pressed against the lower one 3; toward the end of the ingslide l0 is again moved forward and finally, by means of the projection29 the lever 87 is again swung back, whereby the coupling 53-59 is againreleased so that the shaft 20 again stops. In consequence of the end ofthe lever 87 sliding over the project-ion 8G the lever mechanism ismoved in opposition to the action of the spring 8l; whenthe end of thellever has moved past the projection the lever mechanism moves back intoits original position While the projection at the same time springs up.

Having now described my invention, what Iclaim as new and desire tosecure by Letters Patent is l. ln a machine for manufacturing helicalspi 1al springs, a main driving shaft, a pair of feed rollers actuatedby the main driving shaft, a second shaft connected to a driving pulleyby the intermediary of a one-revolution clutch, three cams on this shaftcontrolling a cnt-ting device the Wire feed and a pitch-forming memberrespectively, a regulating shaft driven by a constantly rotating shaft,a tooth adjustably mounted on the .regulating shaft, and means actuatedby said tooth for connecting the driving clutch of the second shaft.

2. In a machine for manufactnring heli.- eal spiral springs, a maindriving shaft, a second shaft connected to a driving pulley by theintermediary of a one-revolution clutch, a regulating shaft driven by aconstantly revolving shaft through the interrevolution of the shaft 20the pitch form-I mediary of a clutch, a tooth adjustably mounted on theregulating shaft, means actuated by said tooth for connecting thedriving clutch of the second shaft, means actuated by a cam on thesecond shaft for holding disengaged the drivingfclritch of theregulating shaft during thefgtime that the wire feed is inactive, andmeans for automatically returning the regulating shaft into its initialposition, While its driving clutch is disengaged.

3. In a machine for manufacturing helical spiral springs, a main drivingshaft, a second shaftconnected to a driving pulley by the intermediaryof a one-revolution' clutch, two cams on the second shaft, by which,when the shaft has made half a revolution, the cutting device isactuated and the Wire feed is rendered inactive, a -tliird cam on thesecond shaft, by which the pitclnforming member is held in inoperativeposition nearly for the whole time of revo lution of the shaft.

i. ln` a machine for manufacturing helical spiral springs, a maindriving shaft, a second shaft, a cutting device, a Wireieed, a pitchforming member', three cams on said second shaft respectivelycontrolling the three last .mentioned devices, the cam controlling thelast device comprising three portions, vthe middle one of which isformed as a. segment of a cylindrical ring and is solid on its shaft,While the" two remaining portions are of slope form arranged to the sideof the middle portion, are adjustable in the direction of rotation,their higher points adjacent the middle portion being of equal heigl'itwith the latter.

'ln testimony whereof I aHiX my signature in presince of two Witnesses.A

ERNST WAGNER. Wi tncsses Ennnsr ENTENMANN, Firma KLAIBER.

